A command-line driven interactive plotting program

Gnuplot is a portable command-line driven interactive data and function plotting utility that supports lots of output formats, including drivers for many printers, (La)TeX, (x)fig, Postscript, and so on. The X11-output is packaged in gnuplot-x11.

Data files and self-defined functions can be manipulated by the internal C-like language. Can perform smoothing, spline-fitting, or nonlinear fits, and can work with complex numbers.

This package is for transition and to install a full-featured gnuplot supporting the X11-output.

http://packages.debian.org/squeeze/gnuplot

http://gnuplot.sourceforge.net/